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6. Approximately what percentage of carbon dioxide is carried as bicarbonate in the red blood cell?

  • 7%
  • 10%
  • 70%
  • 90%
  • 23%

7. Which statement is correct about the lungs?

  • The right lung has 4 lobes, the left lung has 3 lobes
  • The right lung has 2 lobes, the left lung has 3 lobes
  • The right lung has 3 lobes, the left lung has 2 lobes
  • The right lung has 2 lobes, the left lung has 2 lobes
  • The right lung has 3 lobes, the left lung has 3 lobes

8. What is the equilibrium potential of K+? (in mv)

  • -90
  • -60
  • -100
  • -80
  • -70

9. How many airway divisions are there from the trachea to the alveoli?

  • 23
  • 20
  • 25
  • 22
  • 21

10. What is the name of the part of the eye with the sharpest vision?

  • Retina
  • Optic disk
  • Fovea
  • Macula
  • Sclera

11. What's the name of the enzyme which endothelial cells of alveolar capillaries release?

  • ADE
  • Capillarase
  • ACE
  • AGE
  • Angoase

12. Below what concentration of PO2 in oxygenated blood do peripheral chemoreceptors switch on?

  • 20 mmHg
  • 60 mmHg
  • 50 mmHg
  • 40 mmHg
  • 70 mmHg

13. Which part of the eye attaches the lens to the ciliary muscle?

  • Zonules
  • Iris
  • Sclera
  • Canal of schlemm
  • Cornea

14. Which blood vessel carries oxygenated blood away from the lungs?

  • Vena Cava
  • Arterioles
  • Pulmonary artery
  • Pulmonary vein
  • Aorta

15. Which part of the ECG is due to the ventricles contracting?

  • T wave
  • QT interval
  • ST segment
  • P wave
  • QRS complex

16. If atmospheric pressure is 760 mmHg, what would the intra-alveolar pressure have to be for inhalation to occur? (in mmHg)

  • 762
  • 759
  • 763
  • 760
  • 761

17. What is the correct composition of the extracellular fluid?

  • Low [K+] and [Na+], high [Cl-]
  • Low [K+], high [Na+] and [Cl-]
  • High [K+], Low [Na+] and [Cl-]
  • Low [Na+], high [Cl-] and [K+]
  • Low [Cl-), high [K+] and [Na+]

18. Which agent is not used as a vasodilator?

  • Ca channel blockers
  • Adenosine
  • Nitroglycerin
  • Nitrates
  • Beta blockers

19. What do the alpha cells of the pancreas release in response to a low blood glucose level?

  • Glycogen
  • Glucagon
  • Glucose
  • Insulin
  • Adrenaline

20. Approximately what percentage of carbon dioxide is carried in solution, in plasma?

  • 50%
  • 23%
  • 7%
  • 70%
  • 5%